Trisazo dye.



ELUGUSE BLANK AND WILHELM BEBGIWJLT, F LEVERKJSEN, GERMANY, ASSIG-NORS T0 FABBENFABEZKEN WORM. FRIEDR. 80 CG, OF ELBERFELD. GERYBEANY,

A. CORPOBATIGN 0F GERMANY.

m -n ii ziit itdljls lilo Drawing.

Specification of letters Patent.

Application filed March 14, 1910.

Serial No. 549,184

To all whom it may concern:

Be it known that we, AUGUST BLANK and VWTILHIJLM Bnnonon'r, citizens of the German Empire, residing at Leverkusen, Germany, have inventednew and useful Improvements in New A'zo Dyes, of which the following is e specification.

The present invention relates to the in anufacture and production. of new trisuzo dyestuti's. The process for their production consists in combining the diuzo compounds of inonoacidyl-ineta-dianiins of the benzene sewith mninonaphthol sulfonic acids, elii'ninoting the uoidyl radical from the products thus produced by saponiiication, tetruzotizing the resulting azo compounds and combining the tetrnzoazo compounds thus produced with two molecules of the some or of t'li'l'lcrent n1eta-diuinins ot' the benzene series or of derivatives thereof. The new dyes thus produced are after being dried and pulverized dork powders soluble in water generally with u brown color. They have a strong coloring power and their browii shades are fast to acids and ulkzilies. They can be further combined with dinzo compounds and this combination can also be carried out on the fiber. The shades are in this manner materially deepened and mu I dered fast to washing.

In order to illustrate the new process more fully the following example given, the parts being by weight: -13.6 parts of torniyl meta phei'iylenediomin are dial ,0- tized with nitrite and l-lCl. The eoin pound is then introduced into an alkaline solution which has been prepared by dis solving 24 parts of 2-amino-B-naphthoL6- sulfonic acid in an aqueous solution of 36 ports of sodium carbonate. After the combination is COIflplCtG the product of the reaction is heated to bOilIIl The torinyl group is then eliminated from the resulting dye by heating the mixture for J, to 1 hour to boiling with caustic soda lye containing 3?: parts of NuDl'l). Subsequently the exof alkali is neutralized with hydrochloric acid, and the dininin thus obtained is after cooling, with ice tctruzotized with 50 ports of hydrochloric acid no. and 15 ports of nitrite. The mixture is stirred for at hours and the tetruzo compound is then added to u cooled solution of 24.4.- parts oi? meta-toluylencdiuuiin containing ports of sodium carbonate. After about 1 hour the reaction is complete. The dye is filtered off and dried. It is after being dried and pulverized u. dark powder soluble in water with a brown color; yielding upon reduction with stannous chlorid and hydrochloric acid meta-phenylenediziinin, omino-nietu-toluylenedioinin one 2.7- limiiiii0-8-nziphthol-(i-sulionic acid. it dyes cotton brown shades fast to washing after being developed with. di azotized paru-l'iitranilin. Other meta-diainins of the benzene series, such as metephcnylenediuniin, or ch oro-ineta-phenylenediarnin inetu-diaininophenylether, nitrometo-phei'iylenedianiin, alkylitted met-iodinniins, the condensation products of 1netadiuniins with cl'iloroacetic acid or mixtures of these products inlay be used. Other aoid' ylized metiudizunins may be used, c. g. acidylized inetii-toluylenedia.mins, or other substitution products of metnphenylenedhn inin, inetu-toluylenediziniino-oxaminic sultonic acid, etc, and other aininonsphthoi sult'onic acids, 9. 1.8.3.6 or 2.1.5.7umino nophtlioldisultonic acid, 1.5.7- or 2.5.7en1inonophthol sulfonic acid etc.

Mixed dyestutls can be prepared on. two difierent molecules of metu diainins {53 end components, a. 9. one molecule of meta.- phenylenediamin sult'onic acid and one molecule of metaphenylenediamin, etc.

Vi e clai1nz- 1. The herein described new trisazo dyestuffs which are after being dried and pulverized dark powders soluble in water generally with a. brown color, dyeing cotton brown shades fast to washing after being developed with diazotized para-nitranilin, substantially as described.

2. The herein described new trisazo dyestuli obtainable from formyl metephenylenediuniin, Q-nmino 8- naphthol 6 sulfonic acid and inetu-toluylenediainin, which is after being dried and pulverized a dark powder soluble in water with a brown color, dyeing cotton brown shades first to washing after being developed with diazotized para- 1 set our hands in the presence of two subnitrnnllin, and ylelchng upon reductlon 'wlth scrlblng wltnesses.

stannous chlorid and hydrochloric acid AUGUST BLANK. [14.5.] meta-phenylenedinmin a1nino-meta-toluyle VVELHELM BERGDQLT. [1,. s1] nediamin and 2.7-ciiaminaSaaphthol-G- Witnesses:

snlfonic acid, substantially as described. OTTO KZjNIG,

Ln tesiimony whereof We have hereunto CHAS. J. VVRIGHT. 

